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zero initialize structs, begin porting my chip8 emulator

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This commit is contained in:
Antoni Piasecki
2026-03-11 16:21:57 +01:00
parent 88915bbc8a
commit 12f283e5f8
3 changed files with 120 additions and 8 deletions
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13
src/codegen_x86_64.rs
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@@ -111,11 +111,6 @@ _builtin_read64:
mov rax, qword [rdi]
ret
section .text._builtin_set8
_builtin_set8:
mov [rdi], sil
ret
section .text._builtin_set64
_builtin_set64:
mov [rdi], rsi
@@ -671,8 +666,14 @@ _builtin_environ:
Expr::New(struct_name) => {
let struct_fields = &self.analyzer.structs[&struct_name.lexeme];
emit!(&mut self.output, " mov rdi, {}", struct_fields.len() * 8);
let memory_size = struct_fields.len() * 8;
emit!(&mut self.output, " mov rdi, {}", memory_size);
emit!(&mut self.output, " call mem.alloc");
emit!(&mut self.output, " push rax");
emit!(&mut self.output, " mov rdi, rax");
emit!(&mut self.output, " mov rsi, {}", memory_size);
emit!(&mut self.output, " call mem.zero");
emit!(&mut self.output, " pop rax");
}
Expr::MemberAccess { left, field } => {
let offset = self.get_field_offset(env, left, field)?;